Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

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Class 7 Science Chapter 12 Extra Questions and Answers Reproduction in Plants

Extra Questions for Class 7 Science Chapter 12 Reproduction in Plants with Answers

Reproduction in Plants Class 7 Extra Questions Very Short Answer Type

Question 1.
What is reproduction?
Answer:
The production of new individuals from their parents is known as reproduction.

Question 2.
What is cutting?
Answer:
Cutting is to cut piece of a branch of a plant with a pode which is capable of*producing new plant under suitable conditions.

Question 3.
Name one plant that can reproduce through leaves.
Answer:
Bryophyllum.

Question 4.
What are the male and female reproductive part in plants?
Answer:
The stamens are the male reproductive part and the pistil is the female reproductive part in plants.

Question 5.
What are unisexual flowers?
Answer:
The flowers which contain either only the pistil or the stamens are called unisexual flowers.

Question 6.
What are bisexual flowers?
Answer:
The flowers which contain both stamens and pistil are called bisexual flowers.

Question 7.
What is fruit?
Answer:
Mature ovary is called fruit.

Reproduction in Plants Class 7 Extra Questions Short Answer Type 1

Question 1.
What are the vegetative parts of plant?
Answer:
Roots, stems and leaves are called the vegetative parts of a plant.

Question 2.
Write the benefits of vegetative propagation.
Answer:
Benefits of vegetative propagation:

1. Plants produced by vegetative propagation take less time to grow and bear flowers and fruits earlier than those produced from seeds.
2. The new plants are exact copies of the parent plant, as they are produced from a single parent.

Reproduction in Plants Class 7 Extra Questions Short Answer Type 2

Question 1.
Where are male and female gametes in flowers?
Answer:
Anther contains pollen grains which produce male gametes. The female gamete or the egg is formed in an ovule, which is a part of ovary.

Question 2.
Draw figure to show self and cross-pollination.
Answer:

Question 3.
Draw a diagram to show vegetative reproduction in bryophyllum.
Answer:

Question 4.
How are plants get benefitted by seed dispersal?
Answer:
Benefits of seed dispersal to plants :

1. It prevents competition between the plant and its own seedlings for sunlight, water and minerals.
2. It also enables the plants to invade new habitats for wider distribution.

Question 5.
We have never seen the seeds of sugarcane, potato and rose. How do these plants reproduce?
Answer:
Sugarcane, potato and rose reproduce by means of vegetative propagation:

Question 6.
Show fertilization with the help of diagrams.
Answer:

Reproduction in Plants Class 7 Extra Questions Long Answer Type

Question 1.
Describe reproduction in fungus.
Answer:
The fungi on a suitable place grow from spores which are present in the air. When spores are released they keep floating in the air. As they are very light they can cover long distances.

The spores are asexual reproductive bodies. Each spore is covered by a hard protective coat to withstand unfavourable conditions such as high temperature and buy humidity. So they can survive for a long tirhe. Under favourable conditions, a spore germinates and develops into a new individual.

Question 2.
Explain the method of reproduction in yeast with the help of a diagram.
Answer:
Yeast is a single-celled organism which reproduces by budding. When it gets sufficient nutrients, a small bulb-like projection starts coming out from it which is called a bud. The bud gradually grows and gets detached from the parent cell and forms a new yeast cell. The new yeast cell grows, matures and produces more yeast cells. Sometimes, another bud arises from the bud forming a chain of buds. If this process continues, a large number of yeast cells are produced in a short time.

Question 3.
Explain the process of reproduction in alga.
Answer:
Algae are the slimy green patches that are often seen in ponds, or in other stagnant water bodies. When water and nutrients are available algae grow and multiply rapidly by fragmentation. An alga breaks up into two or more fragments. These fragments or pieces grow into new individuals. This process continues and they cover a large area in a short period of time.

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